Download presentation
Presentation is loading. Please wait.
Published byJosephine Atkins Modified over 9 years ago
2
BIOLOGY 1300 CHAPTERS 8, 9 & 10 DNA, RNA, PROTEIN SYNTHESIS MITOSIS, MEIOSIS, AND GENETICS
3
DNA and RNA DNA NUCLEOTIDES ADENINE THYMINE GUANINE CYTOSINE RNA NUCLEOTIDES ADENINE URACIL GUANINE CYTOSINE
4
A NUCEOTIDE CONTAINS: SUGAR—PENTOSE DNA—DEOXYRIBOSE RNA—RIBOSE PHOSPHATE NITROGENOUS BASE PURINES ADENINE, GUANINE PYRIMIDINES THYMINE, URACIL, CYTOSINE
5
THE CENTRAL DOGMA DNA-REPLICATES BY SEMICONSERVATIVE REPLICATION DNA-FORMS RNA BY TRANSCRIPTION RNA MAKES PROTEINS BY TRANSLATION [SEE PAGES 152-153]
6
DNA HELD IN PLACE: PROKARYOTIC CELLS HU PROTEINS EUKARYOTIC CELLS HISTONES WHICH WIND AROUND THE DNA TO FORM NUCLEOSOMES
7
DNA POLYMERASE ATTACHES THE NUCLEOTIDES TOGETHER DURING SEMICONSERVATIVE REPLICATION TO FORM THE NEW DNA STRANDS
8
CHROMOSOME TWISTED DNA HELD TOGETHER BY HISTONES TELOMERES ARE THE ENDS OF THE CHROMOSOME— AS THESE ARE LOST THE CELL AGES
9
DNA CODES INITIATOR OR START CODE— TAC ON DNA TERMINATOR OR STOP CODE ON DNA —ATT, ATC, OR ACT WHAT ARE THESE ON MRNA ? [CODONS]
10
GENES SECTIONS OF DNA WHICH CODE FOR CERTAIN PROTEINS, ETC. OF THE CELL USUALLY IN A CERTAIN POSITION ON THE CHROMOSOME TRANSPOSONS ARE ‘JUMPING GENES’ WHICH MOVE AROUND ON THE SAME CHROMOSOME OR TO OTHER CHROMOSOMES MUTATIONS ARE CHANGES IN GENES SEE PAGES 158-160 FOR THE DIFFERENT TYPES]
11
STAGES OF MITOSIS —Somatic cell division [One division--final cells have the 2n or diploid number of chromosomes INTERPHASE PROPHASE METAPHASE ANAPHASE TELOPHASE
12
MEIOSIS—REDUCTION DIVISION [Two divisions-- the final cells have the n or haploid number of chromosomes] OOGENESIS UNEQUAL DIVISION OF CYTOPLASM RESULTS IN 4 CELLS—1LARGE EGG AND 3 SMALL POLAR BODIES [Only the egg is capable of being fertilized] SPERMATOGENESIS HAS EQUAL DIVISION OF THE CYTOPLASM RESULTING IN 4 CELLS OF EQUAL SIZE
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.